The tragic incident happened when Deepti, a student of Delhi University's Kamla Nehru College was returning home, after attending her classes.
Deepti was crossing the August Kranti Marg road around 1.30 pm, when a speeding car, Volkswagen Polo, driven by a 50-year-old woman Nalini Agarwal hit her.
Deepti, who suffered grievous injuries and was bleeding profusely, was taken to the AIIMS Trauma Centre, where she was declared brought dead.
Nalini Agarwal, who had fled the accident scene, was later arrested from her Jangpura residence, by the police under section 279 of the IPC and causing death due to negligence.
"Agarwal, who had stopped her car on the spot after the incident, had fled the scene leaving the car and her cell phone," a police official said.
Deepti had won around 40 medals across the country in various games and was part of the team which recently won a national junior level championship in kabaddi.
A passerby, identified as Pankaj Dheer had informed police about the incident.
Her distraught family members said that Deepti was a 2nd year geography student and had topped in her exams.
They also told a newspaper, "Deepti had represented Delhi in the junior national championships in three games- kabaddi, shot put and chess. She was also awarded a certificate of excellence from the union HRD minister for her performance in CBSE examinations."
Her brother, Dipesh, who is a taekwondo player, said that her sister wanted to be an IPS officer.